Lift and force pump.



Patented Mar. 6, I900. S. H. KERFOOT.

LIFT AND FORCE PUMP.

(Application filed Oct. 14, 1898.\

(No Model.)

W WUI llE STATES A ATENT ()FFICE.

SAMUEL I-I. KERFOOT, OF DES MOINES, IOWA, ASSIGNOR, BY MESNE AS-SIGNMENTS, TO KATHERINE KERFOOT, OFSAME PLACE, AND ELENOR S. GUMP, OFCHICAGO, ILLINOIS.

LIFT AND FORCE PUMP.

SPECIFICATION forming part of Letters Patent No. 645,034, dated March 61900.

Application. filed October 14:, 1898.

To aZZ whom, it may concern:

Be it known that I, SAMUEL H. KERFOOT, a citizen of the United States,residing at Des Moines, in the county of Polk and State of Iowa, haveinvented a new and useful Lift and Force Pump, of which the following isa specification.

My object is to improve the construction and increase the efficiency ofdouble-action force-pumps as required to elevate a continuous stream andforce it a greater distance with less power and labor than heretofore.

My invention consists in the arrangement and combination of elementswhereby the initial end of the discharge-pipe is located within andsurrounded by the mouth of the air chamber in order that theair-pressure may be exerted around the vertical plane of theWater-column in the discharge-pipe as contradistinguished from theexertion of the air-pressure at the point laterally removed and distantfrom the water-column in the discharge-pipe.

My invention consists, further, in the arrangement and combination of anair-chamber and air-conducting tube and water-discharge pipe with awater-chamber and cylinders and pistons, as hereinafter set forth,pointed out in my claim, and illustrated in the accompanying drawing, inwhich The letter A designates a water-chamber.

B and B are cylinders connected with the Water-chamber, and O and O areopposing pistons fixed to a rod D, that is designed to be reciprocatedin the cylinders as required to lift water into the water-chamber andalso force it upward therefrom.

F is an air-chamber located at some space above the water-chamber A andfixed thereto by means of an open-ended coupling-tube H, that hasexternal screws on its ends fitted in correspondingly-screw-threadedapertures in the said chambers, as required to rigidly connect thechambers.

J is an air-tube fixed in the top of the airchamber F to supply airthereto.

K is a discharge-pipe that has an internal screw-thread at its lowerend, and L is an Serial No. 693,573. (No model.)

open-ended extension that has an external screw at its top fitted andfixed in the lower end of the pipe K, that also has an externalscrew-thread at its lower end fitted and fixed into a screw-threadedaperture in the top of the air-chamber H in such a manner that theextension L will project down through the open-ended coupling-tube I-Iinto the waterchamber A to conduct water up into the discharge-pipe K,While at the same time air in the air-chamber F .Will press upon waterin the coupling-tube H and the water-chamber A as required to serve as acushion and to aid in maintaining a steady pressure and steadycontinuous flow of water through the discharge-pipe K, while the twopistons are reciprocated in their respective cylinders.

In the practical operation of my invention a steady stream and largervolume of water can be forced through a greater length of tubing or hoseof a given diameter and a greater quantity of water thrown in a solidstream a greater distance and with less applied power than any otherpump of the same class.

Having thus described my invention, What I claim as new, and desire tosecure by Letters Patent, is

In a pump the combination of the waterchamber A of materially-greatertransverse than Vertical dimension,the cylinderB located below andcommunicating with one end portion of the. bottom of the Water-chamberA, the cylinder B located above and communicating with one end portionof the top of the water-chamber in alinement with the cylinder B, theadjacent end portions of the cylinders being spaced apart a distance atleast equal to the depth of the water-chamber, pistons O, 0 mounted forconjunctive reciprocation in the cylinders, a pipe H mounted in,communicating with and rising from the opposite end portion of the topof the waterchamber and open at both ends, an air-chamber F, ofmaterially-greater dimension transversely than vertically,mounted on theupper end of the pipe H and communicating therenicating with and risingfrom the end. portion spaced apart from the Walls of the pipe H and Y ofthe top of the air-chamber adjacent the Water-chamber. cylinder B andclosed at its upper end, and

a discharge-pipe traversing the air-chamber SAMUEL KERFOOT' 5 F and pipeH and extending at its lower end Witnesses:

into the Water-chamber A, the said lower end J AS. BARELS,

of the discharge-pipe being entirely free and THOMAS G. ORWIG'.

